| Atelier de Fabrication des Timbres-Poste |
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| Atelier de Fabrication des Timbres-Poste Paris |
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| Atelier de Fabrication des Timbres-Poste, Paris |
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| Atelier du Timbre, Malines |
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| Atelier Général du Timbre Bruxelles |
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| Aucun Lithographie |
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| Australia Post |
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| Australia Post Sprintpak |
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| Australia Post/Sprintpak |
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| Australia Post/Sprintpak | Tongan Government Printer (O) |
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| Australia Sprintpak |
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| Austrian State Printing Company, Vienna |
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| Austrian State Printing Works, Vienna |
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| Autoprint, Georgetown (O) | Bovell's Printery (O) | De La Rue & Co. Ltd. |
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| Autoprint, Georgetown (O) | John Waddington Security Print Ltd. |
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| Avery Dennison (AVR) |
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| Azerpost |
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| Bagel Security-Print GmbH & Co. KG |
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| Bakes & Lord, Bradford |
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| Baltic Banknote |
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